Pipe joint assembly



935 P. b. MALLAY 1,988,694

PIPE JOINTlASSEMBLY Filed Jan. 51, 1935 INVENTQR I Paul lZMa/lhgz ATTORNEY OFFICE PIPE JOINT ASSElVmLY Paul D. Mallay, Larchmont, N. Y., assignor to Johns-Manville Corporation, New York, N. Y., a corporation of New York Application January 31, 1933, Serial No. 654,367 1 Claim. (crass-137) This invention relates to apipe joint assemeach including, advantageously, a hub element bly, particularly to one adapted for use in joinor inner portion 6 or 16 and an upstanding poring sections of pipe that are relatively breakable tion or element '7 provided with holes 8, through under excessive compression or flexing. which bolts 9 are secured in the finished assem- The structure of the invention is suited espebly. The hub elements, at their edges nearest 5 cially for joining sections of pipe comprising to the joint, carry the upstanding portions. At asbestos fibers and Portland cement in comthe edge that is remote from the joint, the hub pressed and densified and then hardened condielements are provided each with an inwardly tion. projecting circumferential shoulder 10, which 10 It is an object of the invention to provide a forms a recess 11 between the remainder of the 10 fluid-tight pipe joint assembly that is readily hub element and the pipe. This recess extends assembled in the field, that ,forms a joint profrom the edge of the hub element nearest to'the viding flexibilityin the finished pipe line, and joint to the beginning of the shoulder. Furtherthat limits the amount of compression which more, the hub element may be beveled at its 15 may be applied to the outside of the ends of the edge nearest to the joint, as indicated at 12, to 15 sections of pipe that are being joined, even facilitate moving the hub element over the sealthough the assembly is being made by unskilled ing ring, towards the joint, in making the finworkmen. Additional objects and advantages ished assembly. will appear as the description of the invention The method of making the finished assembly progresses. is largely evident from the drawing and the de- 20 An embodiment of the invention that is prescription that has been given. ferred at this time is illustrated in the drawing The ring flanges and then the rubber sealing in which: rings are placed over the ends of the sections of Fig. 1 shows a longitudinal sectional view of pipe that are to be joined, one flange and one an assembly that is not completed; ring to each of the said ends, and the ends of 25 Fig. 2 shows a simlar view of the completed the pipe 'are then brought approximately into assembly; abutment, so that the pipe sections are arranged Fig. 3 shows across-sectional view on line 3-3, end to end, all as illustrated in Fig. 1. The of Fig. 2; and flanges are then forced over the sealing rings,

Fig. 4 shows a longitudinal sectional view of in such manner as to compress the sealing rings 30 a form of the pipe joint assembly in which the in the recesses between the pipe and the hub or flange is not provided with a hub element, but inner portion of the flange element, as illuscarries a restraining shoulder on the edge of the trated at 13 in Figs. 2 and 4. Suitably, the sealinner portion of the flange proper. ing rings are compressed in the finished assem- In the figures there are shown sections of pipe bly to approximately one-half of their original 35 1 that may be of a more or less fragile nature, thickness. By Selec Of the Original in such as the asbestos and Portland cement comthickness and the depth of the recesses between position referred to above. These sections are the hub element of the flange and the pipe, it arranged end to end, in approximately abutting is possible to establish in advance the approxirelationship, to form a joint between adjacent mate extent of compression which is applied, 40 ends, as illustrated at 2. The adjacent ends are roug t e resilient Sealing rings, o the e s provided with recesses 3, which are somewhat of the section of P removed from the joint itself, to provide for up- When the flanges are in position, they are standing shoulders 4 between the recesses and ured to ch h r. at the p n in pe the pipe section ends. tions, as by the bolts 9; that is, one flange is 45 Disposed around the adjoining ends of the secured t th dja nt flan nt pp sit pipe sections and suitably within the recesses 3, ide Of t jo e fl n e may be bolted are elastic, resilient, readily deformable sealing v y ti htly W t affecting pp ci y h rings or elements 5, of rubber or the like. These t t of comp ession of the fragile p ends rings are suitably of diameter that is originally ide he Sealing ringS- 50 somewhat less than that of the portion of the The tWO flanges S0 secured o e ch other are pipe around which they fit. Thus, the rings are caused to form a fluid-tight joint therebetween. stretched in being placed over the pipe and, once To facilitate this forming of the fluid-tight joint in position, contact firmly therewith. between the two adjoining flange elements, a

The assembly includes also adjacent flanges, gasket 14 may be present in the joint between 55 rubber compound, and may be essentially a flat ring.

A pipe joint constructed as described is capable of withstanding a considerable end thrust.

A strong end thrust causes adjacent sections of pipe to separate from each other and to compress the ring sealing element between the shoulder 4 on the ends of the pipe sections and the shoulders 10 or 17 on the flange element.

To increase the flexibility of the structure, the hub elements or inner portions of the flanges may extend a shorter distance from the joint between adjacent pipe sections than the recesses in the pipes themselves extend from the said joint, as illustrated at 15. This provision adapts the hub element, at the edge remote from the joint, to be moved into the recess in close proximity to the side thereof, or away from it, as the pipe line is flexed. At the same time the restraining shoulders 4 and 10 or 17 on the ends of the pipe'sections and the edge of the hub.

elements or inner portions of the flanges, respectively, prevent the complete lateral displacement of the pair of bolted-together flanges from over the pipe joint and prevent also the blowing out of the rubber ring sealing elements under hydrostatic pressure.

It will be noted that the inner portions of the flanges may be spaced at all points from the ends of the pipe sections disposed within the said flanges. This increases furtherthe flexibility of the joint assembly.

As stated, the invention is particularly suitable for use in joining sections of asbestos and I Portland cement pipe. With such pipe and with flanges and also fastening elements 9 that are non-corrodible, as they are in the preferred embodiment of the invention, there is produced a joint assembly which in all parts is non-corrodible. For example, the flanges and fastening elements may be constructed of steel of high chromium content, a nickel chromium alloy, or the like. Dr, non-metallic compositions may be used in the flange element, as, for example, hard rugber or phenol aldehyde condensation produc When non-metallic compositions are used, additional strength may be obtained by making the flange element proper as thick as the hub element. In other words. the so-called hub element in this case is simply the edge-of the flange, as illustrated in the modification shown disposed, one each, around the several ends of adjoining pipe sections and over readily compressible, resilient sealing rings thereon and adapted to be secured to an adjacent ring element, to form a two-piece sleeve over the pipe joint. The hub element referred to is typical of and includes the inner portion of the ring element, such as the inner portion 16 of the flanges illustrated in Fig. 4.

The details that have been given are for the purpose of illustration, not restriction, and many variations may be made therefrom without departing from the spirit and scope of the invention.

What I claim is:

A pipe joint assembly comprising sections of pipe arranged end to end, in approximately abutting relationship, to form a joint between. adjacent ends, and provided with circumferen-- tial recesses in the outer wall of the pipe sections. near the ends thereof, resilient, readily deformable ring sealing elements disposed in the said recesses, and .closing means disposed around the ends of the adjoining pipe sections and over' the sealing rings, in contacting relationship with the rings, and extending on opposite sides of the joint a slightly lesser distance, than the said recesses extend, whereby an end of the closing means may be moved into the said recess, in close proximity to the side thereof, when the assembly is flexed.

. PAUL D. MALLAY. 

